US2679479A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Inorganic gelling agent thickened fluorocarbon grease compositions
Assignee: Shell Development Co
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Filing: 1952-09-30
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Granted: 1954-05-25
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Expires: 1972-09-30
Abstract
No abstract record available.
Inventors
- 👤 Walter H Peterson
- 👤 Saarni Walfrid
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 03:15
CPC Classifications
C; C10; C10M; C10M7/00; C10M2201/00; C10M2201/06; C10M2201/062; C10M2201/063; C10M2201/14; C10M2207/00; C10M2207/02; C10M2207/021; C10M2207/022; C10M2207/10; C10M2207/12; C10M2207/121; C10M2207/122; C10M2207/125; C10M2207/129; C10M2211/00; C10M2211/02; C10M2211/024; C10M2211/04; C10M2211/042; C10M2211/044; C10M2211/06; C10M2213/00; C10M2213/02; C10M2213/04; C10M2213/06; C10M2213/062; C10M2215/00; C10M2215/02; C10M2215/04; C10M2215/08; C10M2215/082; C10M2215/16; C10M2215/24; C10M2215/26; C10M2215/28; C10M2223/00; C10M2223/06; C10M2223/061; C10M2223/065; C10M2227/00; C10M2227/08; C10M2229/00; C10M2229/02; C10M2229/04; C10M2229/041; C10M2229/05; C10N; C10N2010/00; C10N2010/04; C10N2010/10; C10N2040/00; C10N2040/02; C10N2050/00; C10N2050/08; C10N2050/10
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
112 words
A GREASE COMPOSITION COMPRISING AS THE LUBRICATING OIL A SUBSTANTIALLY COMPLETELY FLUORINATED HYDROCARBON OIL DISTILLING AT TEMPERATURES IN THE RANGE OF FROM ABOUT 50* C. TO ABOUT 300* C. AT 10 MM. HG PRESSURE, SAID OIL BEING GELLED TO A GREASE STRUCTURE WITH A SILICA GEL HAVING ITS NORMAL WATER CONTENT SUBSTANTIALLY ENTIRELY REPLACED BY SAID OIL, THE SURFACES OF THE GEL BEING ESTERIFIED WITH ALIPHATIC ALKOXY RADICALS, SAID RADICALS HAVING FROM ABOUT 3 TO ABOUT 12 CARBON ATOMS EACH, THE GREASE ALSO HAVING DISPERSED THEREIN FROM ABOUT 1% TO ABOUT 10% BY WEIGHT OF A SUBSTANTIALLY COMPLETELY FLUORINATED FATTY ALCOHOL HAVING FROM ABOUT 3 TO ABOUT 18 CARBON ATOMS PER MOLECULE.
References Cited (Backward Citations)
US2625508A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 1957-05-24 | 1957-11-23 | 1958-05-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-05-24 | 1961-11-23 | 1962-05-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-05-24 | 1965-11-23 | 1966-05-25 | $7700.00 | Window Closed / Lapsed |